Zaynab Mosque is located in Kampong Lumut about 32km from Pekan Belait. Construction of the mosque began in the 13th. July, 1985 on the site of a land area of 2.5 acres and was completed in 1992 and first used in the 28th. Safar, 1413 corresponding to 28th. August, 1992. official opening of the mosque was completed by His Majesty Paduka Seri Baginda Sultan Haji Hassanal Bolkiah Mu'izzaddin Waddaulah, Sultan and Yang Di-Pertuan of Brunei Darussalam, on Friday, the 25th. Muharram, 1419 corresponding to 22th. May, 1998. The mosque is a waqf Awang Haji Abd.Samad bin Haji Metussin. Capacity mosque can accommodate 2,000 worshipers. One of the facilities available in the rooms of the mosque libraries.